[ebxml-cppa] ds:Reference element under the ProcessSpecificationelement in the CPP/A schema

[Arvola Chan <arvola@tibco.com>]

The ProcessSpecification element in the CPP/A schema contains zero or one
ds:Reference element that is intended to provide a digest for the referenced
business process specification (for the purpose of detecting if the latter
has been modified) in case the CPP/CPA is to be signed.

On reading the ebBPSS1.03.xsd, I realize that one ProcessSpecification
element in the BPSS schema can include zero or more other
ProcessSpecification by reference either directly or directly: directly
because the ProcessSpecification element can have 0 or more Include
elements; indirectly because the ProcessSpecification element can have a
Package element which in turn can have 0 or more Include elements.

I don't think it is sufficient for the CPP/A ProcessSpecification element to
have only 0 or 1 ds:Reference element. The cardinality should probably be
changed to "unbounded", to allow for the inclusion of digests for all
ProcessSpecifications that may be referenced directly or indirectly.

-Arvola